33 Miss. Code. R. 204-7.5
No boat slip/pier shall be constructed or used for the purpose of mooring watercraft equipped with holding tanks unless sewer pump out facilities are provided to all slips. Such pump out facilities shall be vacuum type facilities approved by the District which serve from one to four slips from one common control point. Transient-type facilities may have the option of incorporating stationary pump-out unit(s). Additionally, all marinas must provide at least one "porta-potty" dump station. All existing boat slips/piers within public or private marinas on the Reservoir which moor water-craft equipped with a holding tank shall be modified to provide on site pump out facilities as described above on or before May 1, 2010.
33 Miss. Code. R. 204-7.5